Headlight



May 29, 1928. 1,671,900

W. IRWIN HEADLIGHT Filed OO&. 20, 1925 INVENTCR WITNESSES Wiliz'am [rwuz m BY 14... MUIIM ATTORNEYS Patented May 29, 1928.

'ILLI'AM'IRWIN, orNEw Y K, N. Y.

HEADLIGHT.

Application'filcd October 20, 1925. Serial No. 63,629.

m 1 his invention relates to improvements 1n lamps and more particularlyto improvements in headlights, and is particularly adapted for use as an automobile headlight.

The object of the invention is aglareless lamp..

Another object of this invention is a lamp of the character described which is comparatively inexpensive to manufacture.

Another object of this invention is a lamp wherein the reflector is integral with the framework of the lamp.

Another object of this invention is the elimination of all unnecessary parts.

In accordance with this invention a source of light is placed in juxtaposition to a piece of material which is fashioned so as to function as a reflector for the light emitted from the light source and at the same time form a part of the framework of the structure; another piece of material is fashioned so as to complete the framework of the structure and at the same time to secure the reflector in the proper position relative thereto. 1

In the drawing, comprising but a. single sheet, the invention is diagrammatically set forth according to the embodiment thereof at present preferred.

Fig. 1 is a side elevation of a lamp structure broken away at 4: to show the lamp partly in section.

Fig. 2 is a plan view of a piece of material from which the body portion 5 of Fig. 1 is fashioned.

Fig. 8 is a front view of the .lamp bulb and the reflector looking in the direction of the arrow shown at the right of Fig. 1.

The device consists in its essential parts of a piece of material 6 fashioned as illustrated in Fig. 1, and treated so as to produce a reflecting surface upon its concave side. This element 6 also serves as a portion of the framework of the'lamp. Inthe embodiment illustrated it serves as the back of the lamp. At the center of the reflector 6 is a hole of suitable size capable of carrying an adjustable tubular member 7. The memher 7 is threaded and adjustably engages the threaded member 8 which is fixed with respect to 6. To one end of the tubular member 7 is secured a lamp holder, socket, or adapter 9. This lamp holder may be made integral with the tubular member 7 or it may be removably secured thereto. As the preferred embodiment of the device utilizes electricity as a source of energyv the bulb 10 is provided. This bulb may be of any preferredtype so long as it is capable of being secured in the adapter 9. The-centreated inany' suitable manner to render it opaque. Preferably it is coated with a film of mercury or other lustrous substance. The set screw 12 is adjustably mounted in thethreaded member 8 and serves to lock the tubular member 7 in position after the,

desired adjustment thereof has been ob tained.

The lamp 10 is connected to a source of electric energy (not shown) by means of the insulated conductor 18. l

The main body portion of the lamp is cylindrical with converging ends. The body is formed from a piece of material 5 cut in the shape shown in Fig. 2. This strip of material, preferably metal, is bent into a cylinder and the ends 1414 are secured together in any desired manner. When thus fashioned the strip 5 assumes the shape shown in elevation in Fig. 1. The edge 15 forms a surface upon which the reflector 6 rests, In view of the shape of the element 5, the edge 15 is in a plane convergent to that occupied by the edge 16, when the ele ment 5 is fashioned as shown in Fig. 1. As the edge 16 is intended to occupy a vertical plane, the plane occupied by the edge 15 will be inclined to the vertical. The reflector element 6 will lie in the plane occupied by the edge 15, with the result that the ele ment 6 will be tilted at an angle to the vertical and the tubular member 7 and lamp 10 will also occupy a plane converging with the horizontal.

A transparent element (not shown) such, for example, as glass, is secured in a framework 18 which is of a suitable size so that it engages with the body portion and fits snugly against the edge 16, thus forming the face of the lamp.

The framework 5 is provided with a series of notches shown in section in Fig. l. The reflector 6 is furnished with a rim as shown in Fig. 1. This rim fits snugly over the framework of the body portion 5. As shown in Fig. 1, the rim is drilled and tapped and is furnished with a set screw 20 and a lock nut 21. lVhen the back is in position the set screw 20 is tightened in the threaded hole in the rim of the reflector 6 and engages in one of the notches 19 of the tral portion 11 of the surface of'the bulb'is body portionv 5. The locknut 21 is then tightened to prevent the set screw from losing its tension. may be moved With respect to the body 5 Within the adjustment limits afforded by the notches 19 and the set screw 20 andiloclr nut 21 will rigidly secure the reflector 6 in any one of these several positions.

To obtain maximum efficiency While at the same time eliminating all glare, the reflector 6 should be substantially shallow as represented in Fig. 1. With a lamp Whose diameter is lOinches, the best result is ob tained when the depth of the reflector,

measured along the axis of the tubular Obviously the reflector 6 positioned defining member as indicated by the symbol a, is seven-eighths inches.

I claim:

The combination- With a shallow concave reflector Whose surface defines a minor sector of a. sphere, a shield concentrically positioned in spaced relation with respect to said reflector, an'da source of light projecting from said reflector adjacent the centre thereof and positioned and the shield, of a cylindrical lamp body Where'on the reflector is positioned, the of the lamp body Whereon an inclined plane.

WILLIAM IRWVIN.

between the reflector 

